<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <script src="../static/vue/2.6.10/vue.js" type="text/javascript"></script>
    <title>Title</title>
</head>
<body>
    <div id="app">
        <ul>
            <li v-for="(item, index) in items">
                {{ parentMessage }} - {{ index }} - {{ item.message }}
            </li>
        </ul>
    </div>

    <script type="text/javascript">
        let vm = new Vue({
            el: '#app',
            data: {
                parentMessage: 'Parent',
                items: [
                    {message: 'Foo'},
                    {message: 'Bar'}
                ]
            }
        });
    </script>
</body>
</html>